Incandescent electric lamp.



E, H. TATS nwfaa'maczzvr nimm@ LAMP.

1`,O36,`744 Patented Aug. 27, 1912.

2 SHEETS-SBEET 1,

@my z l @if Y S2* zum'. n. Tarn, or Los aucuns, camroama.

nrcammsonnr nnncrnic uur.

lpeelaeatioii et Letters Patent.

Patented Aug. 27, 191 2.

Application aled September 5, 1911. serial No. 647,887.

To all whom it may concern.' Be it known that I Emi. H. Tarn, a citizenof the United States, residing at Los Angeles, in the county of Los Aneles and State of California, ave invente certain new and usefulImprovements in Incandescent Electric Lamps and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it ap pertains tomake and use the same. c

This invention relates to improvements in incandescent electric lamps.

One object of the invention is to provide a lamp of this characterhaving arran ed therein means whereby the lam is coo ed and the bulbthus prevented rom being broken b the intense heat generated from hi hcan le power lights.

nother o ect is to provide a lam of this character aving an im rovedcons ruction and arrangement o filaments and means for supportin thesame.

With these and o er objects in view, the invention consists lof certainnovel features of construction, and the combination and arran ement ofparts as will be more fully descri ed and claimed.

In the accompanying drawings: Figure 1 .is a side view of my im rovedlam parte being broken awa and in section' ig. 2 is a vertical sectionsview thereof; ig. 8 is a top plan view' Fi .4isabottom plan view of theglass cap or c osing the inner end of the bulb and for forming a sup ortfor the filament holding and heat 'disc arging element of the lamp; Fig.5 is a horizontal sectional view on the line 5--5 of Fig. 2 Fig. 6 is asimilar view on the line 6-6 of Fi 2.

Referring more particularly to ing 1 denotes the lass'bulb of the lampsaid bulb being of e usual or an desire shape. To the inner end of thebul is fused or otherwise firmly secured a circular convex cap 2 formedof lass or other suitable insulating or non-'con ucting material. In thecenter of the'lowerfside of the ca is formed a depending or inwardlyexten in frustoconica rshaped prozection 4.aroun which inthe yinner'side ofj e drawforatonswthepu oseo which'wil "be icrenafte'r-more ful ydescribedipfj Arranged fonfthe cap 2 and "inner he cap -isformed anannular recess 5. I:Through the prol'ection:

the bulb is a hollow metal base or shell 7 which is preferably threadedas shown and otherwise corres onds to the usual hase of nn incandescentamp. The base or shell T has arranged in its outer end a disk 8 ofinsulating material to the outer side of which is secured a terminal orcontact plate l). On the inner edge of the base or shell 7 is formed askirt 10 which extends over the outer edge of the cap and the adjacentportion of the bulb as shown. The skirt is cemented or otherwise ri idlysecured to the outer edge of the cap. hrough the cement and between thesurface of the cap and adjacent portion of the skirt are formed two ormore air assages 8 the upper and inner ends of whic communicate with thespace in the hollow shell or base 7 and the einer ends of whichcommunicate with slots 11 formed in the skirt or extension 10 of thebase or shell. The assages 6 in the cap 2 also communicate with thespace in the shell or base 7 as shown.

Within the bulb 1 is a combined filament supporting and heat dischargingmechanism A.comprising a pendant narrow cone 12 formed of tin, glass orother suitable insulating or non-conducting material, said coneprojecting into the bulb to the roper dis- ,tance an having formed onits arger open end an annular radially projecting attaching flange 18which fits and is adapted to bc secured within the annular recess 5 inthe inner side of the cap 2 b fusing or in any other suitable manner.Wiien the conc is thns lsecured to the cap the projection 4 on the innerside of the cap extends into and closely tits the open end of the concas shown. Preferably, though not'necessarily arranged in the cone 12 isa cone shaped metallic ining 14 which extends to within a short.distance of the open end of the conc 12 as shown. The lining 14 has abright reflecting surface and may be constructed of tin foi or thinsheet metal or may be sim ily in the form 0f a metallic coating appliedlto the inner side of the cone.

Arranged through and fused or welded in the sides of the cone 12 andvprojecting through the lining 14 adjacent to the open end t ereof arediagonally arranged current conductin pins 15 which serve to hold thelining 14 in place and to the opposite ends Jof w ich vare connected thecurient conducting Wires 16 and 17 of the lam i. The currentconducting-wires 16 and 1i pass ont of the lam through the assages 6 inthe cap Arranged on the upper portion of the cone 12 is an upperfilament supporting disk 18 formed of g ass or other non-conductingmaterial, said disk having formed therein a centrall disposed i passageto receive the cone. round the passage in the disk 18 is formed 1 anannular -laterally projecting flange 19 which closely fits the side ofthe cone 12 and forms an increased bearingsurface for the disk. In theouter portion of the disk are molded angularly bent substantiallV-shaped filament supporting wires 20 t e ends of which project beyondthe outer edge of the disk and form han ers to which the ends of thefilaments are so dered or otherwise firmly secured. One of the ends ofthe wires 20 is longer and projects a greater distance from the edge ofthe disk than its companion end so t at when the filaments are securedto said ends one strand of the filaments will be disposed nearer to thecone near its smaller end and spaced a suitable distance from the disk18 is a second filament holding disk 21 which is constructed in asimilar manner but is somewhat smaller than the disk 18. Embedded in thedisk 21 is a series of radially projectin filament engagin wires 22 inthe outer en s of which are ormed bends or hooks which en age the loopsof the filaments and hold the atter in pro er position relative to theouter surfaces o the cone. The inner ends of the conducting wires 16 and17 are connected to the ends of the wires 20 or adjacent ends of thefilaments as shown. By providing a cone shaped filament su portconstructed and arranged as herein s own and described to ther with theperforated hollow base or s ell 7 and the perforated cap 2 the heat fromthe incandescent filaments will be absorbed by the glass cone and itsmetal lining and the heat thus'absorbed will form a vortex in the conesand will thus be rapidly drawn out throu h the rforations 0 in the cap 2and disc arged hrough the passages 8 and slots 11 in the skirt of theshell or base 7. By arranging one strand of each of the filaments closerto the surface of the cone than the other, the heat from these strandsor fllaments'will be absorbed by the cone before itican reach the bulb,thus relieving the latter of .this much.

of the heat generated by the filaments.-

connection withv t e 'accompany' the constructiony andoperation'foinventionwill be'readilyl lunderstood withoutr. l

quiring a morel extended e lanationa? and the minor details ofconstruction may be resorted to without departing from the. principle orsacrificing any of the advanytags of the invention as claimed.

aving thus described my invention, what I claim is:

1. In an incandescent electric lamp, a bulb, av non-conducting cacemented to the inner end of said bulb an( having a frusto- 'conicalBroection at its center extending into the ul a pair of perforationsthrough the cap and projection, and a groove around the latter on theinner face of the cap, a hollow metal base with whose interior saidperforations communicate, the base haring a skirt secured to the cap andbulb and pierced with discharge slots also communieatin with theinterior of the base, a hollow e ement having a flange secured in saidrecess so that its interior communicates with said perforations, alining within this element, filament-carrying devices mounted on theelement, ins through its wall, and wires leading rom said devicesthrough said pins and perforations and to contact points carried by saidbase. the cone than the other strand. Secured to i 2. In an incandescentelectric lamp, a bulb, a non-conductin cap secured to .the inner end ofsaid bu b, said cap having* 1formed therein a series of perforations an(an annular recess, a narrow pendant cone formed of insulatin materialarranged in said bulb, a flange. ormed on the open end ,of said cone andsecured in the recess in said cap whereby the cone is held in o erativeposition in the bulb, a frusta-conica projection formed on the innerside of said cap and extending iiito saidcone, and a hollow metal basehavin a skirt surrounding said cap and the adjacent end .of the bulb,said skirt being cemented to the edge of the cap and having formedtherein heat discharging skirtand the cap havingformed therein passa escommunicating with said slots in the skirt and the s ace in said hollowbase.

lnotches. adaptedto en age the loops of the fllaments,`and means w erebythe heat within Baidcone is. discharged from the lamp.

4. In an incandescent electric lamp, a bulb, a hollow cone in said bulb,upper and ower-` non-conducting filament supporting y A disks onsaid'cone, filament su porting wires Various changes intheormpproportion c'arried by,r said disks, a per orated cap on slots, saidcement connection between the` the inner end of the bulb and su portinsaid cone, and a hollow base secures to sai rap and having heatdischarging openings whereby the heat from the cone is discharged to theexterior.

5. In an incandescent electric lamp, a bulb7 a hollow cone shapedfilament supporting and heat absorbing cone arranged in said` bulb,upper and lower non-conductin(r tilaiiieiit supporting disks arranged onsaid cone, filament su port-ing wires arranged in said upper dis t, saidwires having angularly projecting ends, one of which is of greaterlength than the other whereby some of the lilaiiieiit strands are closerto said rone than the others, filament engaging wires arranged in saidlowex` filament supporting disk, said wires having their outer ends bentto forni notches adapted to engage the looped ends of the filament, aperforated cap arranged on the inner end of the bulb and adapted tosupport said cone, a hollow base or shell secured to said ca i and tothe adjacent end of the bulb, said base or `shell having formed thereinheat discharging openings whereby the heat froiii ihe cone is dischargedfrom the lamp.

In testimony whereof I have hereunto set my hand in presence of tivosubscribing u'ii'- nesses.

EARL ll. 'l`.\l`l1. Witnesses:

SAM Timciiizii, L. O. Roiinirrsox.

Copies of this patent may be obtained for Iva centi each, by addressingthe Commissioner of Patents, Washington, D. 0.

